Low-dose radiation linked to increased lifetime risk of heartdisease bmj_latest
A linked editorial suggests that these risks"should now be carefully considered in protection against radiation in medicine and elsewhere."
They excluded uninformative datasets or those largely duplicating others, leaving 93 studies, published mainly during the past decade, suitable for analysis. These studies covered a broad range of doses, brief and prolonged exposures, and evaluated frequency and mortality of various types of vascular diseases.
For example, the relative risk per gray increased for all cardiovascular disease and for specific types of cardiovascular disease, and there was a higher relative risk per dose unit at lower dose ranges , and also for lower dose rates ., excess absolute risks ranged from 2.33% per Gy for a current England and Wales population to 3.66% per Gy for Germany, largely reflecting the underlying rates of cardiovascular disease mortality in these populations.
Substantial variation was found between studies, although this was markedly reduced when the authors restricted their analysis to higher quality studies or to those at moderate doses or low dose rates .
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